Congress had every opportunity to carve out exceptions to the Religious Freedom Restoration Act when Democrats passed the ACA. They didn't. Why? Maybe it was an oversight when Democrats were rushing to pass a bill--any bill!!!--using questionable parliamentary tactics. Maybe it was because adding such exceptions would have ruined any chance of passage. That's not really relevant. The fact is that Congress created no exception to the law, and so ACA enforcement has to be consistent with it. That was the law that Democrats almost unanimously supported back in 1993. It's still the law today.